How do I solve this? This is a security market line question

when the risk free rate is 0.4%, and the return on the market is 7 7% per year The beta for Walmart stock is 0.19 and the beta for Apple Computer inc is 1.46.Please answer the following question. SML Betas 1 Beta 0 a. In the diagram above, please fil i (A) and (B) with both symbols in the SML and numbers.(23) b. Please calculate the expected return on Walmart stock with an equation. (2%) C. Please calculate the expected return on Apple Computer Inc. stock. (2%) In the above diagram, please indicate the corresponding beta and expected return for Walmart and Apple Computer Inc. respectively (2%) d. There is a portfolio consists of 50% of the market portfolio and Stock. What is the expected return on this portfolio? (3%) 50% of Apple Computer Inc. e